Digital ink duct for a press, digital ink supply system and application method thereof

Abstract

The present invention discloses a digital ink duct for a printing press, comprising an ink tank for storing ink, a main ink pipe that communicates with the ink tank, at least one metering-type ink delivery device, ink delivery pipes, a controller and a signal acquisition device. In the present invention, high-accuracy, metering-type ink delivery devices are arranged in a queue to form a digital ink duct which replaces the traditional ink duct and supplies ink for the ink zones. The present invention can perform accurate adjustment in real time, is high in automation and digitalization degree, and can realize one-way ink delivery and avoid ink return.

Description

[0001]This is a U.S. national stage application of PCT Application No. PCT / CN2017 / 072008 under 35 U.S.C. 371, filed Jan. 22, 2017 in Chinese, claiming the priority benefits of Chinese Application No. 201610075723.7, filed Feb. 3, 2016; Chinese Application No. 201610078208.4, filed Feb. 3, 2016; Chinese Application No. 201610156149.8, filed Mach 17, 2016; Chinese Application No. 201610156192.4, filed Mach 17, 2016, all of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION1. Technical Field[0002]The present invention belongs to the technical field of printing technology, printing processes, mechanical and electronic control, and digital computing technologies, and specifically relates to an accurate digital ink supply system for a press, the working principle and application methods thereof.2. Description of Related Art[0003]A printing press is mainly constituted by an ink supply system, an ink distributing mechanism and a printing mechanism. At present, the ink su...

AI Technical Summary

Benefits of technology

[0027]The method of the present invention realizes accurate quantitative control over the ink supply to the press, and by adopting the high-performance metering-type ink delivery device, the quantitative resolution may reach 0.2 ml (cubic millimeter).

[0028]In the present invention, high-accuracy, metering-type ink delivery devices are arranged in a queue to form a digital ink duct which replaces the traditional ink duct; the metering-type ink delivery devices replaces the traditional ink keys to supply ink to respective ink zones. According to the actual printing action of the press, the ink required for printing a sheet is supplied each time a sheet is printed, and the metering is based on the ink volume or mass. In modern printing processes, the printing process has been digitalized, and the process management module can accurately calculate the theoretical ink amount according to the image-text information and the actual printing conditions (for example, printed sheet, ink variety, etc.) According to the press field data (for example current printing speed, starting and stopping of the actual printing production, etc.), the controller performs automatic control over each one of the ink delivery devices of each one of the color cells of the press, and accurately supplies ink in real time according to the actual ink demand of each corresponding one of the ink zones. For ink supply with the method of the present invention, the actual supply is calculated and accurately controlled, and can be precisely adjusted in real time. The present invention is high in automation and digitalization degree and large in adjustable range, realizes one-way ink delivery, avoids ink return, and well solves the shortcomings and defects of the traditional press.

[0029]At the same time, the present invention enhances the automation and intelligence level of the operation and use of the press, and decreases the dependence on the personal skills and experience of the press operators; the accurate digital ink supply method enhances the overall performance of the press, enhances the print quality, maintains stable quality and ensures the consistency in quality of the sheet turning operation; the accurate digital ink supply method shortens the preparation time before the press starts to work and the commissioning time during operation switching, and reduces the waste of paper and ink caused by commissioning of the press; the ink is delivered in a one-way mode in a fully enclosed environment without circulating reflux, thus avoiding ink contamination and waste; and the enclosed ink delivery reduces the workload in equipment maintenance and cleaning.

Problems solved by technology

Ink keys are mechanical products, and the actual opening regulation ranges are very small (usually with the range of 0-0.2 mm), causing relatively large difficulty in the calculation of the zero position and the accurate control of the opening degree.

The absolute accuracy and relative accuracy cannot be ensured.

These mechanisms and working principles make the calculation, regulation and control of the actual ink supply more difficult and fail to be accurately quantified.

But they all fail to essentially realize the accurate quantitative control of the ink supply.

The regulation of the ink supply amount is based on experience and tests, so the efficiency is low.

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